Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
The outside temperature at an altitude
A
A
A
km above ground level in a particular city is
T
(
A
)
=
25
−
6
A
T(A) = 25 - 6A
T
(
A
)
=
25
−
6
A
°C. The altitude of an aeroplane
t
t
t
minutes after taking off is
A
(
t
)
=
12
−
60
t
+
5
A(t) = 12 - \frac{60}{t+5}
A
(
t
)
=
12
−
t
+
5
60
km. Find the composite function
T
∘
A
T \circ A
T
∘
A
, and explain what it means.
Browse the problem library